Going Skiing Will Cost Adam $80 a Day

Multiple Choice

Going skiing will cost Adam $80 a day. He also loses $40 per day in wages because he has to take time off from work. Adam still decides to go skiing.

A) Adam's lost $40 per day in wages is not an opportunity cost and so did not affect his decision.
B) He loses a total of $120 per day, so his decision is irrational.
C) The $80 price of skiing is not an opportunity cost and so did not affect Adam's decision.
D) His decision is rational if Adam's marginal benefit of spending a day skiing is greater than his marginal cost.
E) Adam is definitely making a decision that is in the social interest.